IPQ8074 APSS clock controller provides the clock for the IPQ8074 CPU
cores, thus also providing support for CPU frequency scaling.
It looks like they are clocked by the XO and a custom APSS type PLL.
Co-developed-by: Ansuel Smith <ansuelsmth@xxxxxxxxx>
Signed-off-by: Ansuel Smith <ansuelsmth@xxxxxxxxx>
Signed-off-by: Robert Marko <robimarko@xxxxxxxxx>
---
Changes in v2:
* Convert to using parent-data instead of parent-names
---
drivers/clk/qcom/Kconfig | 11 +++
drivers/clk/qcom/Makefile | 1 +
drivers/clk/qcom/apss-ipq8074.c | 170 ++++++++++++++++++++++++++++++++
3 files changed, 182 insertions(+)
create mode 100644 drivers/clk/qcom/apss-ipq8074.c
diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index 00fe5f066de5..9494eb74374a 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -134,6 +134,17 @@ config IPQ_APSS_6018
Say Y if you want to support CPU frequency scaling on
ipq based devices.
+config IPQ_APSS_8074
+ tristate "IPQ8074 APSS Clock Controller"
+ select IPQ_GCC_8074
+ depends on QCOM_APCS_IPC || COMPILE_TEST
+ help
+ Support for APSS clock controller on IPQ8074 platforms. The
+ APSS clock controller manages the Mux and enable block that feeds the
+ CPUs.
+ Say Y if you want to support CPU frequency scaling on
+ IPQ8074 based devices.
+
config IPQ_GCC_4019
tristate "IPQ4019 Global Clock Controller"
help
diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
index 671cf5821af1..7b2da6dd570c 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -22,6 +22,7 @@ obj-$(CONFIG_APQ_MMCC_8084) += mmcc-apq8084.o
obj-$(CONFIG_CLK_GFM_LPASS_SM8250) += lpass-gfm-sm8250.o
obj-$(CONFIG_IPQ_APSS_PLL) += apss-ipq-pll.o
obj-$(CONFIG_IPQ_APSS_6018) += apss-ipq6018.o
+obj-$(CONFIG_IPQ_APSS_8074) += apss-ipq8074.o
obj-$(CONFIG_IPQ_GCC_4019) += gcc-ipq4019.o
obj-$(CONFIG_IPQ_GCC_6018) += gcc-ipq6018.o
obj-$(CONFIG_IPQ_GCC_806X) += gcc-ipq806x.o
diff --git a/drivers/clk/qcom/apss-ipq8074.c b/drivers/clk/qcom/apss-ipq8074.c
new file mode 100644
index 000000000000..38d03cd0ff76
--- /dev/null
+++ b/drivers/clk/qcom/apss-ipq8074.c
@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2022, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/clock/qcom,apss-ipq8074.h>
+
+#include "common.h"
+#include "clk-regmap.h"
+#include "clk-pll.h"
+#include "clk-rcg.h"
+#include "clk-branch.h"
+#include "clk-alpha-pll.h"
+#include "clk-regmap-divider.h"
+#include "clk-regmap-mux.h"
+
+#define F(f, s, h, m, n) { (f), (s), (2 * (h) - 1), (m), (n) }
+
+enum {
+ P_XO,
+ P_GPLL0,
+ P_GPLL2,
+ P_GPLL4,
+ P_APSS_PLL_EARLY,
+ P_APSS_PLL
+};
+
+static struct clk_alpha_pll apss_pll_early = {
+ .offset = 0x5000,
+ .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_APSS],
+ .clkr = {
+ .enable_reg = 0x5000,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "apss_pll_early",
+ .parent_data = &(const struct clk_parent_data) {
+ .fw_name = "xo", .name = "xo"
+ },
+ .num_parents = 1,
+ .ops = &clk_alpha_pll_huayra_ops,
+ },
+ },
+};
+
+static struct clk_alpha_pll_postdiv apss_pll = {
+ .offset = 0x5000,
+ .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_APSS],
+ .width = 2,
+ .clkr.hw.init = &(struct clk_init_data){
+ .name = "apss_pll",
+ .parent_hws = (const struct clk_hw *[]){
+ &apss_pll_early.clkr.hw },
+ .num_parents = 1,
+ .ops = &clk_alpha_pll_postdiv_ro_ops,
+ },
+};
+
+static const struct clk_parent_data parents_apcs_alias0_clk_src[] = {
+ { .fw_name = "xo", .name = "xo" },
+ { .fw_name = "gpll0", .name = "gpll0" },
+ { .fw_name = "gpll2", .name = "gpll2" },
+ { .fw_name = "gpll4", .name = "gpll4" },
+ { .hw = &apss_pll.clkr.hw },
+ { .hw = &apss_pll_early.clkr.hw },
+};
+
+static const struct parent_map parents_apcs_alias0_clk_src_map[] = {
+ { P_XO, 0 },
+ { P_GPLL0, 4 },
+ { P_GPLL2, 2 },
+ { P_GPLL4, 1 },
+ { P_APSS_PLL, 3 },
+ { P_APSS_PLL_EARLY, 5 },
+};
+
+struct freq_tbl ftbl_apcs_alias0_clk_src[] = {
+ F(19200000, P_XO, 1, 0, 0),
+ F(403200000, P_APSS_PLL_EARLY, 1, 0, 0),
+ F(806400000, P_APSS_PLL_EARLY, 1, 0, 0),
+ F(1017600000, P_APSS_PLL_EARLY, 1, 0, 0),
+ F(1382400000, P_APSS_PLL_EARLY, 1, 0, 0),
+ F(1651200000, P_APSS_PLL_EARLY, 1, 0, 0),
+ F(1843200000, P_APSS_PLL_EARLY, 1, 0, 0),
+ F(1920000000, P_APSS_PLL_EARLY, 1, 0, 0),
+ F(2208000000UL, P_APSS_PLL_EARLY, 1, 0, 0),
+ { }
+};
+
+struct clk_rcg2 apcs_alias0_clk_src = {
+ .cmd_rcgr = 0x0050,
+ .freq_tbl = ftbl_apcs_alias0_clk_src,
+ .hid_width = 5,
+ .parent_map = parents_apcs_alias0_clk_src_map,
+ .clkr.hw.init = &(struct clk_init_data){
+ .name = "apcs_alias0_clk_src",
+ .parent_data = parents_apcs_alias0_clk_src,
+ .num_parents = ARRAY_SIZE(parents_apcs_alias0_clk_src),
+ .ops = &clk_rcg2_ops,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static struct clk_branch apcs_alias0_core_clk = {
+ .halt_reg = 0x0058,
+ .halt_bit = 31,
+ .clkr = {
+ .enable_reg = 0x0058,
+ .enable_mask = BIT(0),
+ .hw.init = &(struct clk_init_data){
+ .name = "apcs_alias0_core_clk",
+ .parent_hws = (const struct clk_hw *[]){
+ &apcs_alias0_clk_src.clkr.hw },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT |
+ CLK_IS_CRITICAL,
+ .ops = &clk_branch2_ops,
+ },
+ },
+};
+
+static struct clk_regmap *apss_ipq8074_clks[] = {
+ [APSS_PLL_EARLY] = &apss_pll_early.clkr,
+ [APSS_PLL] = &apss_pll.clkr,
+ [APCS_ALIAS0_CLK_SRC] = &apcs_alias0_clk_src.clkr,
+ [APCS_ALIAS0_CORE_CLK] = &apcs_alias0_core_clk.clkr,
+};
+
+static const struct regmap_config apss_ipq8074_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = 0x5ffc,
+ .fast_io = true,
+};
+
+static const struct qcom_cc_desc apss_ipq8074_desc = {
+ .config = &apss_ipq8074_regmap_config,
+ .clks = apss_ipq8074_clks,
+ .num_clks = ARRAY_SIZE(apss_ipq8074_clks),
+};
+
+static int apss_ipq8074_probe(struct platform_device *pdev)
+{
+ struct regmap *regmap;
+
+ regmap = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!regmap)
+ return -ENODEV;
+
+ return qcom_cc_really_probe(pdev, &apss_ipq8074_desc, regmap);
+}
+
+static struct platform_driver apss_ipq8074_driver = {
+ .probe = apss_ipq8074_probe,
+ .driver = {
+ .name = "qcom,apss-ipq8074-clk",
+ },
+};
+
+module_platform_driver(apss_ipq8074_driver);
+
+MODULE_DESCRIPTION("Qualcomm IPQ8074 APSS clock driver");
+MODULE_LICENSE("GPL");
--
2.35.1
